aboutsummaryrefslogtreecommitdiff
path: root/sim/erc32/func.c
blob: 85f71817dfdb8c87c1734261b9779c3be2d62956 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
/* This file is part of SIS (SPARC instruction simulator)

   Copyright (C) 1995-2023 Free Software Foundation, Inc.
   Contributed by Jiri Gaisler, European Space Agency

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

/* This must come before any other includes.  */
#include "defs.h"

#include <signal.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include "sis.h"
#include <dis-asm.h>
#include "sim-config.h"
#include <inttypes.h>
#include <sys/time.h>

#define	VAL(x)	strtoul(x,(char **)NULL,0)

struct disassemble_info dinfo;
struct pstate   sregs;
extern struct estate ebase;
int             ctrl_c = 0;
int             sis_verbose = 0;
char           *sis_version = "2.7.5";
int             nfp = 0;
int             ift = 0;
int             wrp = 0;
int             rom8 = 0;
int             uben = 0;
int		termsave;
int             sparclite = 0;		/* emulating SPARClite instructions? */
int             sparclite_board = 0;	/* emulating SPARClite board RAM? */
char            uart_dev1[128] = "";
char            uart_dev2[128] = "";
extern	int	ext_irl;
uint32_t		last_load_addr = 0;

#ifdef ERRINJ
uint32_t		errcnt = 0;
uint32_t		errper = 0;
uint32_t		errtt = 0;
uint32_t		errftt = 0;
uint32_t		errmec = 0;
#endif

/* Forward declarations */

static int	batch (struct pstate *sregs, char *fname);
static void	set_rega (struct pstate *sregs, char *reg, uint32_t rval);
static void	disp_reg (struct pstate *sregs, char *reg);
static uint32_t	limcalc (float32 freq);
static void	int_handler (int32_t sig);
static void	init_event (void);
static int	disp_fpu (struct pstate  *sregs);
static void	disp_regs (struct pstate  *sregs, int cwp);
static void	disp_ctrl (struct pstate *sregs);
static void	disp_mem (uint32_t addr, uint32_t len);

static int 
batch(struct pstate *sregs, char *fname)
{
    FILE           *fp;
    char           *lbuf = NULL;
    size_t         len = 0;
    size_t         slen;

    if ((fp = fopen(fname, "r")) == NULL) {
	fprintf(stderr, "couldn't open batch file %s\n", fname);
	return 0;
    }
    while (getline(&lbuf, &len, fp) > -1) {
	slen = strlen(lbuf);
	if (slen && (lbuf[slen - 1] == '\n')) {
	    lbuf[slen - 1] = 0;
	    printf("sis> %s\n", lbuf);
	    exec_cmd(sregs, lbuf);
	}
    }
    free(lbuf);
    fclose(fp);
    return 1;
}

void
set_regi(struct pstate *sregs, int32_t reg, uint32_t rval)
{
    uint32_t          cwp;

    cwp = ((sregs->psr & 0x7) << 4);
    if ((reg > 0) && (reg < 8)) {
	sregs->g[reg] = rval;
    } else if ((reg >= 8) && (reg < 32)) {
	sregs->r[(cwp + reg) & 0x7f] = rval;
    } else if ((reg >= 32) && (reg < 64)) {
	sregs->fsi[reg - 32] = rval;
    } else {
	switch (reg) {
	case 64:
	    sregs->y = rval;
	    break;
	case 65:
	    sregs->psr = rval;
	    break;
	case 66:
	    sregs->wim = rval;
	    break;
	case 67:
	    sregs->tbr = rval;
	    break;
	case 68:
	    sregs->pc = rval;
	    break;
	case 69:
	    sregs->npc = rval;
	    break;
	case 70:
	    sregs->fsr = rval;
	    set_fsr(rval);
	    break;
    default:break;
	}
    }
}

void
get_regi(struct pstate * sregs, int32_t reg, unsigned char *buf)
{
    uint32_t          cwp;
    uint32_t          rval = 0;

    cwp = ((sregs->psr & 0x7) << 4);
    if ((reg >= 0) && (reg < 8)) {
	rval = sregs->g[reg];
    } else if ((reg >= 8) && (reg < 32)) {
	rval = sregs->r[(cwp + reg) & 0x7f];
    } else if ((reg >= 32) && (reg < 64)) {
	rval = sregs->fsi[reg - 32];
    } else {
	switch (reg) {
	case 64:
	    rval = sregs->y;
	    break;
	case 65:
	    rval = sregs->psr;
	    break;
	case 66:
	    rval = sregs->wim;
	    break;
	case 67:
	    rval = sregs->tbr;
	    break;
	case 68:
	    rval = sregs->pc;
	    break;
	case 69:
	    rval = sregs->npc;
	    break;
	case 70:
	    rval = sregs->fsr;
	    break;
    default:break;
	}
    }
    buf[0] = (rval >> 24) & 0x0ff;
    buf[1] = (rval >> 16) & 0x0ff;
    buf[2] = (rval >> 8) & 0x0ff;
    buf[3] = rval & 0x0ff;
}


static void
set_rega(struct pstate *sregs, char *reg, uint32_t rval)
{
    uint32_t          cwp;
    int32_t           err = 0;

    cwp = ((sregs->psr & 0x7) << 4);
    if (strcmp(reg, "psr") == 0)
	sregs->psr = (rval = (rval & 0x00f03fff));
    else if (strcmp(reg, "tbr") == 0)
	sregs->tbr = (rval = (rval & 0xfffffff0));
    else if (strcmp(reg, "wim") == 0)
	sregs->wim = (rval = (rval & 0x0ff));
    else if (strcmp(reg, "y") == 0)
	sregs->y = rval;
    else if (strcmp(reg, "pc") == 0)
	sregs->pc = rval;
    else if (strcmp(reg, "npc") == 0)
	sregs->npc = rval;
    else if (strcmp(reg, "fsr") == 0) {
	sregs->fsr = rval;
	set_fsr(rval);
    } else if (strcmp(reg, "g0") == 0)
	err = 2;
    else if (strcmp(reg, "g1") == 0)
	sregs->g[1] = rval;
    else if (strcmp(reg, "g2") == 0)
	sregs->g[2] = rval;
    else if (strcmp(reg, "g3") == 0)
	sregs->g[3] = rval;
    else if (strcmp(reg, "g4") == 0)
	sregs->g[4] = rval;
    else if (strcmp(reg, "g5") == 0)
	sregs->g[5] = rval;
    else if (strcmp(reg, "g6") == 0)
	sregs->g[6] = rval;
    else if (strcmp(reg, "g7") == 0)
	sregs->g[7] = rval;
    else if (strcmp(reg, "o0") == 0)
	sregs->r[(cwp + 8) & 0x7f] = rval;
    else if (strcmp(reg, "o1") == 0)
	sregs->r[(cwp + 9) & 0x7f] = rval;
    else if (strcmp(reg, "o2") == 0)
	sregs->r[(cwp + 10) & 0x7f] = rval;
    else if (strcmp(reg, "o3") == 0)
	sregs->r[(cwp + 11) & 0x7f] = rval;
    else if (strcmp(reg, "o4") == 0)
	sregs->r[(cwp + 12) & 0x7f] = rval;
    else if (strcmp(reg, "o5") == 0)
	sregs->r[(cwp + 13) & 0x7f] = rval;
    else if (strcmp(reg, "o6") == 0)
	sregs->r[(cwp + 14) & 0x7f] = rval;
    else if (strcmp(reg, "o7") == 0)
	sregs->r[(cwp + 15) & 0x7f] = rval;
    else if (strcmp(reg, "l0") == 0)
	sregs->r[(cwp + 16) & 0x7f] = rval;
    else if (strcmp(reg, "l1") == 0)
	sregs->r[(cwp + 17) & 0x7f] = rval;
    else if (strcmp(reg, "l2") == 0)
	sregs->r[(cwp + 18) & 0x7f] = rval;
    else if (strcmp(reg, "l3") == 0)
	sregs->r[(cwp + 19) & 0x7f] = rval;
    else if (strcmp(reg, "l4") == 0)
	sregs->r[(cwp + 20) & 0x7f] = rval;
    else if (strcmp(reg, "l5") == 0)
	sregs->r[(cwp + 21) & 0x7f] = rval;
    else if (strcmp(reg, "l6") == 0)
	sregs->r[(cwp + 22) & 0x7f] = rval;
    else if (strcmp(reg, "l7") == 0)
	sregs->r[(cwp + 23) & 0x7f] = rval;
    else if (strcmp(reg, "i0") == 0)
	sregs->r[(cwp + 24) & 0x7f] = rval;
    else if (strcmp(reg, "i1") == 0)
	sregs->r[(cwp + 25) & 0x7f] = rval;
    else if (strcmp(reg, "i2") == 0)
	sregs->r[(cwp + 26) & 0x7f] = rval;
    else if (strcmp(reg, "i3") == 0)
	sregs->r[(cwp + 27) & 0x7f] = rval;
    else if (strcmp(reg, "i4") == 0)
	sregs->r[(cwp + 28) & 0x7f] = rval;
    else if (strcmp(reg, "i5") == 0)
	sregs->r[(cwp + 29) & 0x7f] = rval;
    else if (strcmp(reg, "i6") == 0)
	sregs->r[(cwp + 30) & 0x7f] = rval;
    else if (strcmp(reg, "i7") == 0)
	sregs->r[(cwp + 31) & 0x7f] = rval;
    else
	err = 1;
    switch (err) {
    case 0:
	printf("%s = %d (0x%08x)\n", reg, rval, rval);
	break;
    case 1:
	printf("no such regiser: %s\n", reg);
	break;
    case 2:
	printf("cannot set g0\n");
	break;
    default:
	break;
    }

}

static void
disp_reg(struct pstate *sregs, char *reg)
{
    if (strncmp(reg, "w",1) == 0)
	disp_regs(sregs, VAL(&reg[1]));
}

#ifdef ERRINJ

void
errinj (int32_t arg ATTRIBUTE_UNUSED)
{
    int	err;

    switch (err = (random() % 12)) {
	case 0: errtt = 0x61; break;
	case 1: errtt = 0x62; break;
	case 2: errtt = 0x63; break;
	case 3: errtt = 0x64; break;
	case 4: errtt = 0x65; break;
	case 5: 
	case 6: 
	case 7: errftt = err; 
		break;
	case 8: errmec = 1; break;
	case 9: errmec = 2; break;
	case 10: errmec = 5; break;
	case 11: errmec = 6; break;
    }
    errcnt++;
    if (errper) event(errinj, 0, (random()%errper));
}

void
errinjstart (void)
{
    if (errper) event(errinj, 0, (random()%errper));
}

#endif

static uint32_t
limcalc (float32 freq)
{
    uint32_t          unit, lim;
    double	    flim;
    char           *cmd1, *cmd2;

    unit = 1;
    lim = -1;
    if ((cmd1 = strtok(NULL, " \t\n\r")) != NULL) {
        lim = VAL(cmd1);
        if ((cmd2 = strtok(NULL, " \t\n\r")) != NULL) {
            if (strcmp(cmd2,"us")==0) unit = 1;
      	    if (strcmp(cmd2,"ms")==0) unit = 1000;
            if (strcmp(cmd2,"s")==0)  unit = 1000000;
        }
        flim = (double) lim * (double) unit * (double) freq + 
	   (double) ebase.simtime;
        if ((flim > ebase.simtime) && (flim < 4294967296.0)) {
            lim = (uint32_t) flim;
        } else  {
            printf("error in expression\n");
            lim = -1;
        }
    }
    return lim;
}

int
exec_cmd(struct pstate *sregs, const char *cmd)
{
    char           *cmd1, *cmd2;
    int32_t           stat;
    uint32_t          len, i, clen, j;
    static uint32_t   daddr = 0;
    char           *cmdsave, *cmdsave2 = NULL;

    stat = OK;
    cmdsave = strdup(cmd);
    cmdsave2 = strdup (cmd);
    if ((cmd1 = strtok (cmdsave2, " \t")) != NULL) {
	clen = strlen(cmd1);
	if (strncmp(cmd1, "bp", clen) == 0) {
	    for (i = 0; i < sregs->bptnum; i++) {
		printf("  %d : 0x%08x\n", i + 1, sregs->bpts[i]);
	    }
	} else if (strncmp(cmd1, "+bp", clen) == 0) {
	    if ((cmd1 = strtok(NULL, " \t\n\r")) != NULL) {
		sregs->bpts[sregs->bptnum] = VAL(cmd1) & ~0x3;
		printf("added breakpoint %d at 0x%08x\n",
		       sregs->bptnum + 1, sregs->bpts[sregs->bptnum]);
		sregs->bptnum += 1;
	    }
	} else if (strncmp(cmd1, "-bp", clen) == 0) {
	    if ((cmd1 = strtok(NULL, " \t\n\r")) != NULL) {
		i = VAL(cmd1) - 1;
		if ((i >= 0) && (i < sregs->bptnum)) {
		    printf("deleted breakpoint %d at 0x%08x\n", i + 1,
			   sregs->bpts[i]);
		    for (; i < sregs->bptnum - 1; i++) {
			sregs->bpts[i] = sregs->bpts[i + 1];
		    }
		    sregs->bptnum -= 1;
		}
	    }
	} else if (strncmp(cmd1, "batch", clen) == 0) {
	    if ((cmd1 = strtok(NULL, " \t\n\r")) == NULL) {
		printf("no file specified\n");
	    } else {
		batch(sregs, cmd1);
	    }
	} else if (strncmp(cmd1, "cont", clen) == 0) {
	    if ((cmd1 = strtok(NULL, " \t\n\r")) == NULL) {
		stat = run_sim(sregs, UINT64_MAX, 0);
	    } else {
		stat = run_sim(sregs, VAL(cmd1), 0);
	    }
	    daddr = sregs->pc;
	    sim_halt();
	} else if (strncmp(cmd1, "debug", clen) == 0) {
	    if ((cmd1 = strtok(NULL, " \t\n\r")) != NULL) {
		sis_verbose = VAL(cmd1);
	    }
	    printf("Debug level = %d\n",sis_verbose);
	} else if (strncmp(cmd1, "dis", clen) == 0) {
	    if ((cmd1 = strtok(NULL, " \t\n\r")) != NULL) {
		daddr = VAL(cmd1);
	    }
	    if ((cmd2 = strtok(NULL, " \t\n\r")) != NULL) {
		len = VAL(cmd2);
	    } else
		len = 16;
	    printf("\n");
	    dis_mem(daddr, len, &dinfo);
	    printf("\n");
	    daddr += len * 4;
	} else if (strncmp(cmd1, "echo", clen) == 0) {
	    if ((cmd1 = strtok(NULL, " \t\n\r")) != NULL) {
		printf("%s\n", (&cmdsave[clen+1]));
	    }
#ifdef ERRINJ
	} else if (strncmp(cmd1, "error", clen) == 0) {
	    if ((cmd1 = strtok(NULL, " \t\n\r")) != NULL) {
		errper = VAL(cmd1);
	        if (errper) {
		    event(errinj, 0, (len = (random()%errper)));
		    printf("Error injection started with period %d\n",len);
	        } 
	     } else printf("Injected errors: %d\n",errcnt);
#endif
	} else if (strncmp(cmd1, "float", clen) == 0) {
	    stat = disp_fpu(sregs);
	} else if (strncmp(cmd1, "go", clen) == 0) {
	    if ((cmd1 = strtok(NULL, " \t\n\r")) == NULL) {
		len = last_load_addr;
	    } else {
		len = VAL(cmd1);
	    }
	    sregs->pc = len & ~3;
	    sregs->npc = sregs->pc + 4;
	    if ((sregs->pc != 0) && (ebase.simtime == 0))
	        boot_init();
	    printf("resuming at 0x%08x\n",sregs->pc);
	    if ((cmd2 = strtok(NULL, " \t\n\r")) != NULL) {
		stat = run_sim(sregs, VAL(cmd2), 0);
	    } else {
		stat = run_sim(sregs, UINT64_MAX, 0);
	    }
	    daddr = sregs->pc;
	    sim_halt();
	} else if (strncmp(cmd1, "help", clen) == 0) {
	    gen_help();
	} else if (strncmp(cmd1, "history", clen) == 0) {
	    if ((cmd1 = strtok(NULL, " \t\n\r")) != NULL) {
		sregs->histlen = VAL(cmd1);
		if (sregs->histbuf != NULL)
		    free(sregs->histbuf);
		sregs->histbuf = (struct histype *) calloc(sregs->histlen, sizeof(struct histype));
		printf("trace history length = %d\n\r", sregs->histlen);
		sregs->histind = 0;

	    } else {
		j = sregs->histind;
		for (i = 0; i < sregs->histlen; i++) {
		    if (j >= sregs->histlen)
			j = 0;
		    printf(" %8d ", sregs->histbuf[j].time);
		    dis_mem(sregs->histbuf[j].addr, 1, &dinfo);
		    j++;
		}
	    }

	} else if (strncmp(cmd1, "load", clen) == 0) {
	    if ((cmd1 = strtok(NULL, " \t\n\r")) != NULL) {
		last_load_addr = bfd_load(cmd1);
		while ((cmd1 = strtok(NULL, " \t\n\r")) != NULL)
		    last_load_addr = bfd_load(cmd1);
	    } else {
		printf("load: no file specified\n");
	    }
	} else if (strncmp(cmd1, "mem", clen) == 0) {
	    if ((cmd1 = strtok(NULL, " \t\n\r")) != NULL)
		daddr = VAL(cmd1);
	    if ((cmd2 = strtok(NULL, " \t\n\r")) != NULL)
		len = VAL(cmd2);
	    else
		len = 64;
	    disp_mem(daddr, len);
	    daddr += len;
	} else if (strncmp(cmd1, "perf", clen) == 0) {
	    cmd1 = strtok(NULL, " \t\n\r");
	    if ((cmd1 != NULL) &&
		(strncmp(cmd1, "reset", strlen(cmd1)) == 0)) {
		reset_stat(sregs);
	    } else
		show_stat(sregs);
	} else if (strncmp(cmd1, "quit", clen) == 0) {
	    exit(0);
	} else if (strncmp(cmd1, "reg", clen) == 0) {
	    cmd1 = strtok(NULL, " \t\n\r");
	    cmd2 = strtok(NULL, " \t\n\r");
	    if (cmd2 != NULL)
		set_rega(sregs, cmd1, VAL(cmd2));
	    else if (cmd1 != NULL)
		disp_reg(sregs, cmd1);
	    else {
		disp_regs(sregs,sregs->psr);
		disp_ctrl(sregs);
	    }
	} else if (strncmp(cmd1, "reset", clen) == 0) {
	    ebase.simtime = 0;
	    reset_all();
	    reset_stat(sregs);
	} else if (strncmp(cmd1, "run", clen) == 0) {
	    ebase.simtime = 0;
	    reset_all();
	    reset_stat(sregs);
	    if ((cmd1 = strtok(NULL, " \t\n\r")) == NULL) {
		stat = run_sim(sregs, UINT64_MAX, 0);
	    } else {
		stat = run_sim(sregs, VAL(cmd1), 0);
	    }
	    daddr = sregs->pc;
	    sim_halt();
	} else if (strncmp(cmd1, "shell", clen) == 0) {
	    if ((cmd1 = strtok(NULL, " \t\n\r")) != NULL) {
		if (system(&cmdsave[clen])) {
		    /* Silence unused return value warning.  */
		}
	    }
	} else if (strncmp(cmd1, "step", clen) == 0) {
	    stat = run_sim(sregs, 1, 1);
	    daddr = sregs->pc;
	    sim_halt();
	} else if (strncmp(cmd1, "tcont", clen) == 0) {
	    sregs->tlimit = limcalc(sregs->freq);
	    stat = run_sim(sregs, UINT64_MAX, 0);
	    daddr = sregs->pc;
	    sim_halt();
	} else if (strncmp(cmd1, "tgo", clen) == 0) {
	    if ((cmd1 = strtok(NULL, " \t\n\r")) == NULL) {
		len = last_load_addr;
	    } else {
		len = VAL(cmd1);
	        sregs->tlimit = limcalc(sregs->freq);
	    }
	    sregs->pc = len & ~3;
	    sregs->npc = sregs->pc + 4;
	    printf("resuming at 0x%08x\n",sregs->pc);
	    stat = run_sim(sregs, UINT64_MAX, 0);
	    daddr = sregs->pc;
	    sim_halt();
	} else if (strncmp(cmd1, "tlimit", clen) == 0) {
	   sregs->tlimit = limcalc(sregs->freq);
	   if (sregs->tlimit != (uint32_t) -1)
              printf("simulation limit = %u (%.3f ms)\n",(uint32_t) sregs->tlimit,
		sregs->tlimit / sregs->freq / 1000);
	} else if (strncmp(cmd1, "tra", clen) == 0) {
	    if ((cmd1 = strtok(NULL, " \t\n\r")) == NULL) {
		stat = run_sim(sregs, UINT64_MAX, 1);
	    } else {
		stat = run_sim(sregs, VAL(cmd1), 1);
	    }
	    printf("\n");
	    daddr = sregs->pc;
	    sim_halt();
	} else if (strncmp(cmd1, "trun", clen) == 0) {
	    ebase.simtime = 0;
	    reset_all();
	    reset_stat(sregs);
	    sregs->tlimit = limcalc(sregs->freq);
	    stat = run_sim(sregs, UINT64_MAX, 0);
	    daddr = sregs->pc;
	    sim_halt();
	} else
	    printf("syntax error\n");
    }
    if (cmdsave2 != NULL)
	free(cmdsave2);
    if (cmdsave != NULL)
	free(cmdsave);
    return stat;
}


void
reset_stat(struct pstate *sregs)
{
    sregs->tottime = 0.0;
    sregs->pwdtime = 0;
    sregs->ninst = 0;
    sregs->fholdt = 0;
    sregs->holdt = 0;
    sregs->icntt = 0;
    sregs->finst = 0;
    sregs->nstore = 0;
    sregs->nload = 0;
    sregs->nbranch = 0;
    sregs->simstart = ebase.simtime;

}

void
show_stat(struct pstate *sregs)
{
    uint32_t          iinst;
    uint32_t          stime;

    if (sregs->tottime == 0.0)
        sregs->tottime += 1E-6;
    stime = ebase.simtime - sregs->simstart;	/* Total simulated time */
#ifdef STAT

    iinst = sregs->ninst - sregs->finst - sregs->nload - sregs->nstore -
	sregs->nbranch;
#endif

    printf("\n Cycles       : %9" PRIu64 "\n\r", ebase.simtime - sregs->simstart);
    printf(" Instructions : %9" PRIu64 "\n", sregs->ninst);

#ifdef STAT
    printf("   integer    : %9.2f %%\n", 100.0 * (float) iinst / (float) sregs->ninst);
    printf("   load       : %9.2f %%\n",
	   100.0 * (float) sregs->nload / (float) sregs->ninst);
    printf("   store      : %9.2f %%\n",
	   100.0 * (float) sregs->nstore / (float) sregs->ninst);
    printf("   branch     : %9.2f %%\n",
	   100.0 * (float) sregs->nbranch / (float) sregs->ninst);
    printf("   float      : %9.2f %%\n",
	   100.0 * (float) sregs->finst / (float) sregs->ninst);
    printf(" Integer CPI  : %9.2f\n",
	   ((float) (stime - sregs->pwdtime - sregs->fholdt - sregs->finst))
	   /
	   (float) (sregs->ninst - sregs->finst));
    printf(" Float CPI    : %9.2f\n",
	   ((float) sregs->fholdt / (float) sregs->finst) + 1.0);
#endif
    printf(" Overall CPI  : %9.2f\n",
	   (float) (stime - sregs->pwdtime) / (float) sregs->ninst);
    printf("\n ERC32 performance (%4.1f MHz): %5.2f MOPS (%5.2f MIPS, %5.2f MFLOPS)\n",
	   sregs->freq, sregs->freq * (float) sregs->ninst / (float) (stime - sregs->pwdtime),
	   sregs->freq * (float) (sregs->ninst - sregs->finst) /
	   (float) (stime - sregs->pwdtime),
     sregs->freq * (float) sregs->finst / (float) (stime - sregs->pwdtime));
    printf(" Simulated ERC32 time        : %.2f s\n",
        (float) (ebase.simtime - sregs->simstart) / 1000000.0 / sregs->freq);
    printf(" Processor utilisation       : %.2f %%\n",
        100.0 * (1.0 - ((float) sregs->pwdtime / (float) stime)));
    printf(" Real-time performance       : %.2f %%\n",
        100.0 / (sregs->tottime / ((double) (stime) / (sregs->freq * 1.0E6))));
    printf(" Simulator performance       : %.2f MIPS\n",
        (double)(sregs->ninst) / sregs->tottime / 1E6);
    printf(" Used time (sys + user)      : %.2f s\n\n", sregs->tottime);
}



void
init_bpt(struct pstate *sregs)
{
    sregs->bptnum = 0;
    sregs->histlen = 0;
    sregs->histind = 0;
    sregs->histbuf = NULL;
    sregs->tlimit = -1;
}

static void
int_handler(int32_t sig)
{
    if (sig != 2)
	printf("\n\n Signal handler error  (%d)\n\n", sig);
    ctrl_c = 1;
}

void
init_signals(void)
{
    typedef void    (*PFI) ();
    static PFI      int_tab[2];

    int_tab[0] = signal(SIGTERM, int_handler);
    int_tab[1] = signal(SIGINT, int_handler);
}


extern struct disassemble_info dinfo;

struct estate   ebase;
struct evcell   evbuf[EVENT_MAX];
struct irqcell  irqarr[16];

static int
disp_fpu(struct pstate *sregs)
{

    int         i;
    float	t;

    printf("\n fsr: %08X\n\n", sregs->fsr);

#ifdef HOST_LITTLE_ENDIAN
    for (i = 0; i < 32; i++)
      sregs->fdp[i ^ 1] = sregs->fs[i];
#endif

    for (i = 0; i < 32; i++) {
	t = sregs->fs[i];
	printf(" f%02d  %08x  %14e  ", i, sregs->fsi[i], sregs->fs[i]);
	if (!(i & 1))
	    printf("%14e\n", sregs->fd[i >> 1]);
	else
	    printf("\n");
    }
    printf("\n");
    return OK;
}

static void
disp_regs(struct pstate *sregs, int cwp)
{

    int           i;

    cwp = ((cwp & 0x7) << 4);
    printf("\n\t  INS       LOCALS      OUTS     GLOBALS\n");
    for (i = 0; i < 8; i++) {
	printf("   %d:  %08X   %08X   %08X   %08X\n", i,
	       sregs->r[(cwp + i + 24) & 0x7f],
	    sregs->r[(cwp + i + 16) & 0x7f], sregs->r[(cwp + i + 8) & 0x7f],
	       sregs->g[i]);
    }
}

static void print_insn_sparc_sis(uint32_t addr, struct disassemble_info *info)
{
    unsigned char           i[4];

    sis_memory_read(addr, i, 4);
    dinfo.buffer_vma = addr;
    dinfo.buffer_length = 4;
    dinfo.buffer = i;
    print_insn_sparc(addr, info);
}

static void
disp_ctrl(struct pstate *sregs)
{

    uint32_t           i;

    printf("\n psr: %08X   wim: %08X   tbr: %08X   y: %08X\n",
	   sregs->psr, sregs->wim, sregs->tbr, sregs->y);
    sis_memory_read (sregs->pc, (char *) &i, 4);
    printf ("\n  pc: %08X = %08X    ", sregs->pc, i);
    print_insn_sparc_sis(sregs->pc, &dinfo);
    sis_memory_read (sregs->npc, (char *) &i, 4);
    printf ("\n npc: %08X = %08X    ", sregs->npc, i);
    print_insn_sparc_sis(sregs->npc, &dinfo);
    if (sregs->err_mode)
	printf("\n IU in error mode");
    printf("\n\n");
}

static void
disp_mem(uint32_t addr, uint32_t len)
{

    uint32_t          i;
    union {
	    unsigned char u8[4];
	    uint32_t u32;
    } data;
    uint32_t          mem[4], j;
    char           *p;

    for (i = addr & ~3; i < ((addr + len) & ~3); i += 16) {
	printf("\n %8X  ", i);
	for (j = 0; j < 4; j++) {
	    sis_memory_read ((i + (j * 4)), data.u8, 4);
	    printf ("%08x  ", data.u32);
	    mem[j] = data.u32;
	}
	printf("  ");
	p = (char *) mem;
	for (j = 0; j < 16; j++) {
	    if (isprint (p[j ^ EBT]))
		putchar (p[j ^ EBT]);
	    else
		putchar('.');
	}
    }
    printf("\n\n");
}

void
dis_mem(uint32_t addr, uint32_t len, struct disassemble_info *info)
{
    uint32_t          i;
    union {
	    unsigned char u8[4];
	    uint32_t u32;
    } data;

    for (i = addr & -3; i < ((addr & -3) + (len << 2)); i += 4) {
	sis_memory_read (i, data.u8, 4);
	printf (" %08x  %08x  ", i, data.u32);
	print_insn_sparc_sis(i, info);
        if (i >= 0xfffffffc) break;
	printf("\n");
    }
}

/* Add event to event queue */

void
event(void (*cfunc) (int32_t), int32_t arg, uint64_t delta)
{
    struct evcell  *ev1, *evins;

    if (ebase.freeq == NULL) {
	printf("Error, too many events in event queue\n");
	return;
    }
    ev1 = &ebase.eq;
    delta += ebase.simtime;
    while ((ev1->nxt != NULL) && (ev1->nxt->time <= delta)) {
	ev1 = ev1->nxt;
    }
    if (ev1->nxt == NULL) {
	ev1->nxt = ebase.freeq;
	ebase.freeq = ebase.freeq->nxt;
	ev1->nxt->nxt = NULL;
    } else {
	evins = ebase.freeq;
	ebase.freeq = ebase.freeq->nxt;
	evins->nxt = ev1->nxt;
	ev1->nxt = evins;
    }
    ev1->nxt->time = delta;
    ev1->nxt->cfunc = cfunc;
    ev1->nxt->arg = arg;
}

#if 0	/* apparently not used */
void
stop_event(void)
{
}
#endif

void
init_event(void)
{
    int32_t           i;

    ebase.eq.nxt = NULL;
    ebase.freeq = evbuf;
    for (i = 0; i < EVENT_MAX; i++) {
	evbuf[i].nxt = &evbuf[i + 1];
    }
    evbuf[EVENT_MAX - 1].nxt = NULL;
}

void
set_int(int32_t level, void (*callback) (int32_t), int32_t arg)
{
    irqarr[level & 0x0f].callback = callback;
    irqarr[level & 0x0f].arg = arg;
}

/* Advance simulator time */

void
advance_time(struct pstate *sregs)
{

    struct evcell  *evrem;
    void            (*cfunc) (int32_t);
    int32_t           arg;
    uint64_t          endtime;

#ifdef STAT
    sregs->fholdt += sregs->fhold;
    sregs->holdt += sregs->hold;
    sregs->icntt += sregs->icnt;
#endif

    endtime = ebase.simtime + sregs->icnt + sregs->hold + sregs->fhold;

    while ((ebase.eq.nxt->time <= (endtime)) && (ebase.eq.nxt != NULL)) {
	ebase.simtime = ebase.eq.nxt->time;
	cfunc = ebase.eq.nxt->cfunc;
	arg = ebase.eq.nxt->arg;
	evrem = ebase.eq.nxt;
	ebase.eq.nxt = ebase.eq.nxt->nxt;
	evrem->nxt = ebase.freeq;
	ebase.freeq = evrem;
	cfunc(arg);
    }
    ebase.simtime = endtime;

}

uint32_t
now(void)
{
    return ebase.simtime;
}


/* Advance time until an external interrupt is seen */

int
wait_for_irq(void)
{
    struct evcell  *evrem;
    void            (*cfunc) (int32_t);
    int32_t           arg;
    uint64_t          endtime;

    if (ebase.eq.nxt == NULL)
	printf("Warning: event queue empty - power-down mode not entered\n");
    endtime = ebase.simtime;
    while (!ext_irl && (ebase.eq.nxt != NULL)) {
	ebase.simtime = ebase.eq.nxt->time;
	cfunc = ebase.eq.nxt->cfunc;
	arg = ebase.eq.nxt->arg;
	evrem = ebase.eq.nxt;
	ebase.eq.nxt = ebase.eq.nxt->nxt;
	evrem->nxt = ebase.freeq;
	ebase.freeq = evrem;
	cfunc(arg);
	if (ctrl_c) {
	    printf("\bwarning: power-down mode interrupted\n");
	    break;
	}
    }
    sregs.pwdtime += ebase.simtime - endtime;
    return ebase.simtime - endtime;
}

int
check_bpt(struct pstate *sregs)
{
    int32_t           i;

    if ((sregs->bphit) || (sregs->annul))
	return 0;
    for (i = 0; i < (int32_t) sregs->bptnum; i++) {
	if (sregs->pc == sregs->bpts[i])
	    return BPT_HIT;
    }
    return 0;
}

void
reset_all(void)
{
    init_event();		/* Clear event queue */
    init_regs(&sregs);
    reset();
#ifdef ERRINJ
    errinjstart();
#endif
}

void
sys_reset(void)
{
    reset_all();
    sregs.trap = 256;		/* Force fake reset trap */
}

void
sys_halt(void)
{
    sregs.trap = 257;           /* Force fake halt trap */
}

#include "ansidecl.h"

#include <stdarg.h>

#include "libiberty.h"
#include "bfd.h"

#ifndef min
#define min(A, B) (((A) < (B)) ? (A) : (B))
#endif
#define LOAD_ADDRESS 0

int
bfd_load (const char *fname)
{
    asection       *section;
    bfd            *pbfd;
    const bfd_arch_info_type *arch;
    int            i;

    pbfd = bfd_openr(fname, 0);

    if (pbfd == NULL) {
	printf("open of %s failed\n", fname);
	return -1;
    }
    if (!bfd_check_format(pbfd, bfd_object)) {
	printf("file %s  doesn't seem to be an object file\n", fname);
	return -1;
    }

    arch = bfd_get_arch_info (pbfd);
    if (sis_verbose)
	printf("loading %s:", fname);
    for (section = pbfd->sections; section; section = section->next) {
	if (bfd_section_flags (section) & SEC_ALLOC) {
	    bfd_vma         section_address;
	    unsigned long   section_size;
	    const char     *section_name;

	    section_name = bfd_section_name (section);

	    section_address = bfd_section_vma (section);
	    /*
	     * Adjust sections from a.out files, since they don't carry their
	     * addresses with.
	     */
	    if (bfd_get_flavour(pbfd) == bfd_target_aout_flavour) {
		if (strcmp (section_name, ".text") == 0)
		    section_address = bfd_get_start_address (pbfd);
		else if (strcmp (section_name, ".data") == 0) {
		    /* Read the first 8 bytes of the data section.
		       There should be the string 'DaTa' followed by
		       a word containing the actual section address. */
		    struct data_marker
		    {
			char signature[4];	/* 'DaTa' */
			unsigned char sdata[4];	/* &sdata */
		    } marker;
		    bfd_get_section_contents (pbfd, section, &marker, 0,
					      sizeof (marker));
		    if (strncmp (marker.signature, "DaTa", 4) == 0)
		      {
			section_address = bfd_getb32 (marker.sdata);
		      }
		}
	    }

	    section_size = bfd_section_size (section);

	    if (sis_verbose)
		printf("\nsection %s at 0x%08" PRIx64 " (0x%lx bytes)",
		       section_name, (uint64_t) section_address, section_size);

	    /* Text, data or lit */
	    if (bfd_section_flags (section) & SEC_LOAD) {
		file_ptr        fptr;

		fptr = 0;

		while (section_size > 0) {
		    char            buffer[1024];
		    int             count;

		    count = min(section_size, 1024);

		    bfd_get_section_contents(pbfd, section, buffer, fptr, count);

		    for (i = 0; i < count; i++)
			sis_memory_write ((section_address + i) ^ EBT, &buffer[i], 1);

		    section_address += count;
		    fptr += count;
		    section_size -= count;
		}
	    } else		/* BSS */
		if (sis_verbose)
		    printf("(not loaded)");
	}
    }
    if (sis_verbose)
	printf("\n");

    return bfd_get_start_address (pbfd);
}

double get_time (void)
{
    double usec;

    struct timeval tm;

    gettimeofday (&tm, NULL);
    usec = ((double) tm.tv_sec) * 1E6 + ((double) tm.tv_usec);
    return usec / 1E6;
}